cup anemometer การใช้

• The three-cup anemometer also had a more constant torque and responded more quickly to gusts than the four-cup anemometer.
• The three-cup anemometer also had a more constant torque and responded more quickly to gusts than the four-cup anemometer.
• The three-cup anemometer was further modified by the Australian Dr Derek Weston in 1991 to measure both wind direction and wind speed.
• He redefined the absence of wind to be an air speed of, which was about as low a wind speed as a cup anemometer could measure.
• The scale was made a standard for ship's log entries on Royal Navy vessels in the late 1830s and was adapted to non-naval use from the 1850s, with scale numbers corresponding to cup anemometer rotations.
• The three-cup anemometer developed by the Canadian John Patterson in 1926 and subsequent cup improvements by Brevoort & Joiner of the USA in 1935 led to a cupwheel design which was linear and had an error of less than 3 % up to.